204221546623513 has 2 divisors, whose sum is σ = 204221546623514. Its totient is φ = 204221546623512.

The previous prime is 204221546623349. The next prime is 204221546623517. The reversal of 204221546623513 is 315326645122402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189354993039424 + 14866553584089 = 13760632^2 + 3855717^2 .

It is a cyclic number.

It is not a de Polignac number, because 204221546623513 - 2²¹ = 204221544526361 is a prime.

It is a super-2 number, since 2×204221546623513² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (204221546623517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102110773311756 + 102110773311757.

It is an arithmetic number, because the mean of its divisors is an integer number (102110773311757).

Almost surely, 2^{204221546623513} is an apocalyptic number.

It is an amenable number.

204221546623513 is a deficient number, since it is larger than the sum of its proper divisors (1).

204221546623513 is an equidigital number, since it uses as much as digits as its factorization.

204221546623513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2073600, while the sum is 46.

The spelling of 204221546623513 in words is "two hundred four trillion, two hundred twenty-one billion, five hundred forty-six million, six hundred twenty-three thousand, five hundred thirteen".